Article
Version 1
Preserved in Portico This version is not peer-reviewed
On the Wake Properties of Segmented Trailing Edge Extensions
Version 1
: Received: 14 July 2018 / Approved: 16 July 2018 / Online: 16 July 2018 (09:17:42 CEST)
Version 2 : Received: 3 August 2018 / Approved: 5 August 2018 / Online: 5 August 2018 (10:57:40 CEST)
Version 2 : Received: 3 August 2018 / Approved: 5 August 2018 / Online: 5 August 2018 (10:57:40 CEST)
A peer-reviewed article of this Preprint also exists.
Gunasekaran, S.; Curry, D. On the Wake Properties of Segmented Trailing Edge Extensions. Aerospace 2018, 5, 89. Gunasekaran, S.; Curry, D. On the Wake Properties of Segmented Trailing Edge Extensions. Aerospace 2018, 5, 89.
Abstract
Changes in the amount and the distribution of mean and turbulent quantities in the free shear layer wake of a 2D NACA 0012 airfoil and AR 4 NACA 0012 wing with passive segmented rigid trailing edge (TE) extensions was investigated at the University of Dayton Low Speed Wind Tunnel (UD-LSWT). The TE extensions were intentionally placed at zero degrees with respect to the chord line to study the effects of segmented extensions without changing the effective angle of attack. Force based experiments was used to determine the total lift coefficient variation of hte wing with seven segmented trailing edge extensions distributed across the span. The segmented trailing edge extensions had negligible effect of lift coefficient but showed measurable decrement in sectional and total drag coefficient. Investigation of turbulent quantities (obtained through Particle Image Velocimetry (PIV)) such as Reynolds stress, streamwise and transverse RMS in the wake, reveal a significant decrease in magnitude when compared to the baseline. The decrease in the magnitude of turbulent parameters was supported by the changes in coherent structures obtained through two-point correlations. Apart from the reduction in drag, the lower turbulent wake generated by the extensions has implications in reducing structural vibrations and acoustic tones.
Keywords
trailing edge extensions; drag reduction; coherent structures
Subject
Engineering, Mechanical Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Comments (0)
We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.
Leave a public commentSend a private comment to the author(s)
* All users must log in before leaving a comment
